# SDR HEER20150825656

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 25, 2015
- Submitted: August 26, 2015
- Operation: General aviation
- Aircraft: N490PH
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53378
- Aircraft time: 10,938 hours
- Engine: Allsn 250C40B
- Engine time: 2,253 hours
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Bearing
- Part number: M25010106
- Part serial: NWC140170
- Condition: Spalled
- Location: Engine
- Part time: 272 hours
- Component: Turbine
- Component part number: M25010557
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HEER20150825656

## Discrepancy

ENGINE REMOVED 8-12-15 DUE TO OVERTORQUE.  REPLACED TURBINE NR 5 BEARING DUE TO DEEP SCRATCHES ON BALLS AND POSSIBLE SPALLING ON BEARING OUTER RACE.  INSTALLED NEW NR 5 BEARING.  PART WILL BE RETURNED TO MFG FOR FURTHER EVALUATION.

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